To Constellate: to look up in the night sky at stars and make up random and new Constellations.

Constellated (past tense),Constellating

Nina and Jerry sat outside one night gazing at the night sky, they noticed some stars were brighter and made different patterns, Jerry said to Nina that one looks like a cat, and so became the Cat Constellation. The next night Nina asked Jerry if he would like to Constellate with her again.
also similar to Constellating is gazing at clouds and saying that one look like an elephant as different shape clouds float by.